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Cassandra Targett commented on SOLR-13226: ------------------------------------------ I don't know...in general, I wonder why anyone would expect a rule to be followed when they set it as optional. Putting all replicas on a single node feels like a different problem. Setting the rules as strict may mitigate the problem, but why is Solr doing that? > Add note for Node Added Trigger documentation in Autoscaling > ------------------------------------------------------------ > > Key: SOLR-13226 > URL: https://issues.apache.org/jira/browse/SOLR-13226 > Project: Solr > Issue Type: Improvement > Security Level: Public(Default Security Level. Issues are Public) > Components: AutoScaling > Reporter: Amrit Sarkar > Priority: Major > Attachments: SOLR-13226.patch, Screen Shot 2019-02-05 at 3.55.31 > AM.png, Screen Shot 2019-02-05 at 4.02.00 AM.png > > > Node Added Trigger doesn't abide by SOFT rules [strict: false] and results in > abnormal cluster operational behavior. > Let's say; we wish to do the following: > 1. Not more than 10 cores reside on Single node. > 2. Wish to distribute the cores, replicas equally to each Node. > If we go by the following policy: > not more than one replica for unique shard on a node. not a strict rule. > {code} > {"replica":"<2", "shard": "#EACH", "node": "#ANY", "strict": false}, > {code} > distribute the replicas equally across the nodes, not a strict rule. > {code} > {"replica": "#EQUAL", "node": "#ANY", "strict": false}, > {code} > not more than 10 cores allowed on a single node, strict rule. > {code} > {"cores": "<10", "node": "#ANY"} > {code} > cluster state ends up like: > Screenshot -1 > Only the strict rule is followed and multiple replicas are added to single > Solr node, as rules are not strict – _{"replica":"<2", "shard": "#EACH", > "node": "#ANY", "strict": false}_ > While the following with all strict rule generate normal operational > behavior, add a replica to each shard of collection 'wiki' : > {code} > [ > {"replica":"<2", "shard": "#EACH", "node": "#ANY"}, > {"replica": "#EQUAL", "node": "#ANY"}, > {"cores": "<10", "node": "#ANY"} > ] > {code} > Screenshot -2 > This behavior should be documented. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org